Vulnerability Monitor

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CVE-2018-0189

A vulnerability in the Forwarding Information Base (FIB) code of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, network attacker to cause a denial of service (DoS) condition. The vulnerability is due to a limitation in the way the FIB is internally representing recursive routes. An attacker could exploit this vulnerability by injecting routes into the routing protocol that have a specific recursive pattern. The attacker must be in a position on the network that provides the ability to inject a number of recursive routes with a specific pattern. An exploit could allow the attacker to cause an affected device to reload, creating a DoS condition. Cisco Bug IDs: CSCva91655.

Published

2018-03-28T22:29:02.000

Last Modified

2024-11-21T03:37:41.763

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

8.6

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-399
  • Type: Primary
    NVD-CWE-noinfo
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xe < 15.5\(3\)s5 Yes
Operating System cisco ios_xe < 15.5\(3\)m5 Yes
Operating System cisco ios_xe < 15.4\(3\)s7 Yes
Operating System cisco ios_xe < 15.4\(2\)s1 Yes
Operating System cisco ios_xe < 15.4\(1\)s1 Yes
Operating System cisco ios_xe < 15.4\(1\)s0a Yes
Operating System cisco ios_xe < 15.2\(5\)e1 Yes
Operating System cisco ios_xe < 15.2\(4\)e5 Yes
Operating System cisco ios_xe < 15.2\(2\)e1 Yes
Operating System cisco ios_xe < 15.2\(1\)e1 Yes
References